.tab {
    text-align: center;
    margin: 15px 0;
    font-size: 0;
}
.tab span {
    display: inline-block;
    width: 100px;
    height: 24px;
    line-height: 24px;
    background-color: #CCCCCC;
    font-size: 12px;
    color: #FFFFFF;
    font-weight: bold;
    cursor: pointer;
}
.tab span.active {
    background-color: #619FDC;
}
.tab span:nth-child(1) {
    border-top-left-radius: 10px;
    border-bottom-left-radius: 10px;
}
.tab span:nth-child(2) {
    border-left: 1px solid #FFFFFF;
    border-right: 1px solid #FFFFFF;
}
.tab span:nth-child(3) {
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
}
.content {
    margin-top: 20px;
    display: flex;
    padding: 0 20px;
    color: #4E4E4E;
}
.content > div {
    width: 50%;
}
.content .title {

}